How can the vital capacity of the lungs be measured?

The vital capacity of the lungs can be measured using a special device. It’s called a spirometer. It can be used to measure lung volume and some other indicators. People, depending on gender, occupation, age, lifestyle and other factors, may have different lung volumes. By checking the vital capacity of the lungs, it is possible to fix the deviations. Then a person knows that his body cannot do hard work, do some sports, and so on, since the body can suffer from hypoxia.